zxcm209 Zetex Semiconductors plc., zxcm209 Datasheet - Page 6

• Manufacturer Part Number: zxcm209
• Description: Very Low Power Microprocessor Reset Devices
• Manufacturer: Zetex Semiconductors plc.

Interfacing to µP’s with bidirectional reset I/O
The ZXCM series can be used with microprocessors
havng bidirectional reset pins, such as Motorola 68HC11
series. The addition of a 4.7k resistor between the ZXCM
reset output and the processor input ensures correct
Figure 2
Interfacing to µP’s with bidirectional reset I/O.
PIN DESCRIPTION
ZXCM209
ZXCM210
3
2
Pin
Number
1
2
3
v
cc
Pin Name
V
RESET
(ZXCM209)
RESET
(ZXCM210)
Gnd
ZXCM
CC
1
Gnd
v
cc
Output
Reset
Pin Function
Supply voltage (+5, +3.3, +3 volts)
Output remains low while Vcc is below the reset threshold, and for a
minimum 140ms after V
Output remains high while V
minimum 140ms after V
Ground
4.7k
6
CC
CC
operation of the reset circuit. A buffer to other circuit
components is then required to enable the processor
reset drive to operate correctly. The circuit
configuration is shown in Figure 2.
to other
circuits
rises above the reset threshold.
rises above the reset threshold.
CC
is below the reset threshold, and for a
Reset
Input
Micro
Gnd
v
cc
ISSUE 3 - FEBUARY 2001